Combination rod-socket and overshot fishing-tool



W. I., BOROUGH. COMBINATION ROD SOCKET AND OVERSHOT FISHING TOOL'.

APPLICATION FILED'OCT. 30, 1918.

Patented July 20, 1920.

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UNITED STATES PATENT OFFICE.

WILLARD L. BOROG-H, OF FULLER/TON, CALIFORNIA.

Specification of Letters Patent.

Patented July 20, 1920.

Application filed October 30, 1918. Serial No. 260,396.

To all whom it may concern:

Be it known that I, l/YILLARD L. BOROUGH, a citizen of the United States, residing at Fullerton, in the county of Orange and State of California, have invented a new and useful Combination Rod-Socket and Overshot Fishing-Tool, of which the following is a specification.

My invention relates -to the production of petroleum oil. In the production of such oil a piunp` is ordinarily placed in lhe well at the bottom of a string of tubing, this pump being operated through a sv ing .of pump rods which move up and down inside the tubing. InI deep well pumps each of these rods consists of a cylindrical metal body having threaded pins for connecting the v--diiferent rods together. Breakage of these rods is a frequent occurrence and it is often necessary; to pull the tubing and the pump for the purpose ofremoving and replacing the pump rod, Pulling the tubing is an expensive operation requiring the services of a number of men over a considerable period during which the well must be shut down and production ceases.

It is the object of my invention to provide a fishing tool by means of which the broken end of the rod may be caught and recovered without the necessity for pulling the tubing. l

A further object of my invention is to provide such a Iishing tool which will be adapted to catch either thel cylindrical portion of the rod or the enlarged heads secured thereon.

Other objects and advantages will be made evident to one skilled in the art from an inspection of the accompanying drawing when taken in connection with the following specification.

Referring to the drawings which are for illustrative purposes only,

Figure 1 is a cross-section through the center of my invention in its .set position.

Fig. 2 is a similar view showing the parts engaged with the weld on-a pump rod.

Fig. 3 is a similar view showing the parts engaged with the cylindrical portion of a rod.

Fig. 4 is a section on the line 4-4 of Fi 1. Fig. 5 is a side elevation showing the method of securing the overshot in the shoe. Fig. 6 is a section on the line 6 6 of Fig. 1.

Fig. 7 shows a resetting tool. The invention consists of a head 11 which is provided with openings 12 to allow the oil to escape therefrom, this head having a Vslip body 14 threaded thereon at 13. The

lower portion of the slip body has a conical recess 15. in which three slips 16 are placed. These slips are provided with teeth 17 so that they will readily grip a rod, the slips being .held down by a compression spring 18 acting between the head 11 and the top of the slips 16.

Threaded on the lower portion of the slip body 14, as shown at 20, is an overshot body 21. Threaded in the bottom of the overshot body 21 is a shoe 22.

Pivoted on pins 23 in the shoe 22 are four overshot members 24, these members being of such a shape that they can readily fall inwardly as will hereinafter be described. Sliding inside the overshot body 21 is a wedge collar 30, this collar having teeth 31 formed thereon and being of proper size to be forced downwardly outside the overshots 24 by a compression spring 32, this compression spring acting against a shoulder 33 v in the overshot body 21 and against the top of the wedge collar 30. A small wood retaining pinr34 passing through holes in the oversliot body 21 serves to hold the Wedge collar 30 in its upper positionas shown in Fig. 1. 'Teeth 35 are cut on the outside of the oversliot 24 in such a position that they are readily engaged by the teeth 31.

The method of operation of the invention is as follows:

The parts being in the position shown in Fig. 1, the device is run down inside the tubing, being either secured to a string of pump rods or being hung on a cable. The lower end of the shoe 22 is tapered so that it readily passes over the rods regardless of their position inside the tubing, the rod passing upwardly through the opening in the shoe 22 and through the overshots 24 which open to allow any projections on the rod, such as the box 50 or the weld 51, to pass.

As soon as the rod has passed through the.

overshot it strikes the retaining pin 34 which is formed of wood so that it will readily break, thus releasing the wedge collar 30 which is forced downwardly by the spring 32, the parts then assuming the position shown in Fig. 2 in which the overshots 24 are shown forced inwardly to catch under the weld 51. The teeth 31 and 35 are engaged so there is very little likelihood of the parts thereafter jarring loose.

The broken rods may now be removed from the well by pulling upwardly on the body 11 and when they have been drawn to the surface the overshots 2l may readily be disengaged by unscrewing the shoe with its accom pa nying overshots 2l from the overshot body 21. The resetting tool shown in lfig. 7 may then be used to force the wedge collar Si() u p into its upper position, a new retaining pin being put in place to hold it and the parts being reconnected as shown in Fin'. l.

n some cases the rods break at a considerable distance above the enlarged portions and it is necessary to catch the cylindrical portion of the rod. The operator is often unable to tell exactly where the break has occurred due to the fact that rods are often repaired and the lengths vary somewhat. In case there is a considerable portion of the rod above the enlarged portions it is necessary to catch upon the cylindrical portioneof the rod. Upon running the device into the well the parts assume the position shown in Fig. 3 in which the cylindrical portion ot the rod is shown projecting through the slips 1G, the enlarged portions being too far down to pass through the overshots 24. ing upwardly upon the head ll., with the parts in the position shown 'in Fig. 3, the slips 16 are forced downwardly bythe spring 18, the teeth 1T catching in the rod and the weight of the rod tending to pull the sli s downwardly in the conical opening l5. T 1e shape of this opening is such that the teeth are thus t'orced more .irmly into the rod, thus very securely gripping it so thatl it can readily be withdrawn from the well.

By the use of my invention the broken rod can be caught regardlessof whether the break is at or near the enlarged portion or in the center `of the rod. It is, therefore, entirely unnecessary for the workmen to know in advance or to experiment to determine the character of the break as my invention will catch and hold any sort of a broken rod.

l. A fishing tool comprising a head having means formed thereon by which it may be secured to the lower end of a string of pump rods; a slip body threaded on the lower end of said head; slips placed in a conical opening formed in the bottom of said slip body; a compression spring acting between said slips and the bottom of said head; an overshot body threaded to the bottom of said slip body; a shoe threaded to the bottom of said overshot body; a series of overshot members pivotally mounted in said shoe and projecting upwardly into said overshot body; a wedge collar sliding freely in said overshot body above said overshot members; a compression spring acting betweerethe upper end and the bottom of said head; an overshot l body secured to the bottom of said slip body; a shoe secured to the bottom of said overshot body; a series of overshot members pivotally mounted in said shoe and projecting upwardly into said overshot body; a wedge collar sliding freely in said overshot body above said overshot members; a compression spring acting between the upper end of said wedge collars and a projection formed inside said overshot body; and a wooden retaining pin passing through holes formed in said overshot body in such a position that said wooden pin will hold said wedge collar entirely out of contact with said overshot members.

3. A fishing tool comprising a head; a slipv body; a wedge collar sliding freely in said overshot body above said overshot members; a compression spring acting between the upper end of said wedge collars and a projection formed inside said overshot body; and a wooden retaining pin passing through holes formed in said overshot body in such a position that said wooden pin will hold said wedge collar entirely out of contact with said. overshot members.

4. A fishing tool comprising a head; a slip body secured on the lower end of said head; slips placed in a conical opening formed in the .bottom ofcsaid slip body; means for forcing said slips downwardly and inwardly; an overshot body secured to the bottom of said slip body; a shoe secured to the bottom of said overshot body; a series ot overshot members pivotally mounted in said shoe and projecting upwardly into said overshot body; a wedge collar sliding freely in said overshot body above said overshot members; means for. forcing said wedge downwardly into the space between said overshot members and said overshot body; and a wooden retaining pin passing through holes formed in said overshot body in such a position that said wooden pin will hold said ICG wedge Icollar entirely out of contact with said overshot members.

5. vA fishing tool comprising a head; a slip bod secured .on the lower end of said head; s ips placed in a conical opening formed in the bottom of ysaid slip body; meansjfor forcing said slips downwardly and inwardly; an overshot body secured to the bottom of said slip body; a shoe secured to the bottom of said overshot body; a series of overshot members pivotally mounted in said shoe and projecting upwardly into said overshot body; a wedge collar sliding freely in said overshot body above said overshot members; means for forcing said wedge downwardly into jthe space between said overshot members and said overshot body; and means adapted to be released by the entering rod for restraining said wedge collar above said overshot members.

6. A fishing tool comprising a head; a slip body secured on the lower end of said head; slips mounted to be moved inwardly by downward pressure; means for forcing said slips downwardly and inwardly; an ovel shot body secured to the bottom of said slip body; a shoe secured to the bottom of said overshot body; a series of overshot members pivotally mounted in said shoe and projecting upwardly into said overshot body;

a wedge collar sliding freely in said overshot body above said overshot members; means for forcing said wedge downwardly into the space between said overshot mem; bers and said overshot body; and means adapted to be released by the entering rod for restraining said wedge collar above said overshot members.

7. An overshot comprising a body; a series of overshot members in said body; a

wedge member for forcing said overshot members inwardly; and restraining means adapted to hold said wedge member out of engagement with said overshot members; said restraining means being so located that it is rendered ineffective by the entrance of a rod entering said overshot.

8. An overshot comprising a body; a series of overshot members in said body; a

vmember iny its locked position, and means adapted to be released by said entering rod for holding said locking member out of engagement with said overshot member until said rod enters said body.

10. An vovershot comprising a body, an overshot member so situated with relation to said body that it can catch and hold any projection on a rod entering said body, a

locking member for holding said overshot member in its locked position, and a pin so placed as to be broken by said entering rod; for holding said locking member out of engagement with said overshot member until said rod enters said body.

In testimony whereof I have hereunto set my hand at Los Angeles, California, this 16th day of October, 1918.

d WILLARD L. BOROUGH. 

